ASTM B690-22

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: B690 − 18 B690 − 22
Standard Specification for
Iron-Nickel-Chromium-Molybdenum Alloy (UNS N08367)
Seamless Pipe and Tube
This standard is issued under the fixed designation B690; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This specification covers iron-nickel-chromium-molybdenum alloy (UNS N08367) cold-finished annealed or hot-finished
annealed seamless pipe and tube intended for use in special corrosive service and for heat-resisting applications.
1.2 Pipe and tube shall be supplied in the solution heat treated and descaled condition. When bright annealing is used, descaling
is not necessary.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.4 The following safety hazards caveat pertains only to the test method portion, Section 12, of this specification. This standard
does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this
standard to become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this
product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and
determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
A450/A450M Specification for General Requirements for Carbon and Low Alloy Steel Tubes
B880 Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys
E8/E8M Test Methods for Tension Testing of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E1473 Test Methods for Chemical Analysis of Nickel, Cobalt and High-Temperature Alloys
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
This specification is under the jurisdiction of ASTM Committee B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.07 on Refined
Nickel and Cobalt and Their Alloys.
Current edition approved Nov. 1, 2018Oct. 1, 2022. Published January 2019November 2022. Originally approved in 1981. Last previous edition approved in 20132018
as B690 – 02 (2013).B690 – 18. DOI: 10.1520/B0690-18.10.1520/B0690-22.
Designation established in accordance with ASTM E527 and SAE S1086, Practice for Numbering Metals and Alloys (UNS).
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B690 − 22
3.1.1 average diameter, n—average of the maximum and minimum outside diameters, or the maximum and minimum inside
diameters, as determined at any cross section of the tube.
3.1.2 pipe, n—seamless tube conforming to the particular dimensions commercially known as standard pipe.
3.1.3 tube, n—hollow product of round or any other cross section having a continuous periphery.
4. Ordering Information
4.1 It is the responsibility of the purchaser to specify all requirements that are necessary for material ordered under this
specification. Examples of such requirements include, but are not limited to, the following:
4.1.1 Quantity (feet, meters, or number of lengths),
4.1.2 Form (seamless tube or pipe),
4.1.3 Name of material or UNS number,
4.1.4 Finish,
4.1.5 Dimensions:Dimensions:
4.1.5.1 Tube—Outside diameter, minimum wall thickness,
4.1.5.2 Pipe—Standard pipe size and schedule,
4.1.5.3 Length—Specified or random,
4.1.6 Purchaser’s inspection, if required,required (Section 13),
4.1.7 ASTM designation and year of issue, and
4.1.8 Samples for product analysis, if required.
5. Chemical Composition
5.1 The material shall conform to the composition limits specified in Table 1.
5.2 If a product (check) analysis is made by the purchaser, the material shall conform to the permissible variations for product
(check) analysis in Specification B880.
TABLE 1 Chemical Requirements
Composition Limits, %
Element
N08367
Carbon 0.030 max
Manganese 2.00 max
Silicon 1.00 max
Phosphorus 0.040 max
Sulfur 0.030 max
Chromium 20.00 to 22.00
Nickel 23.50 to 25.50
Molybdenum 6.00 to 7.00
Nitrogen 0.18 to 0.25
A
Iron remainder
Copper 0.75 max
A
Iron shall be determined arithmetically by difference.
B690 − 22
TABLE 2 Mechanical Properties of Pipe and Tube
Cold-Worked or Hot-Worked Annealed
N08367
3 3
Thickness # ⁄16 in. (5 mm) > ⁄16 in. (5 mm)
Tensile strength, 100 (690) 95 (655)
min, ksi
(MPa)
Yield strength, 0.2 % 45 (310) 45 (310)
offset, min, ksi
(MPa)
Elongation in 2 in. or 30 30
mm, or 4D, min,%
A
TABLE 3 Permissible Variations in Outside Diameter Tube
Permissible Variations, in. (mm)
Outside Diameter, in. (mm)
Plus Minus
Hot-Finished Seamless Tubes
1 1
4 (101.6) and under ⁄64 0.4) ⁄32 (0.8)
1 1 3
Over 4 (101.6) to 7 ⁄2 (190.5) incl ⁄64 (0.4) ⁄64 (1.2)
1 1 1
Over 7 ⁄2 (190.5) to 9 (228.6) incl ⁄64 (0.4) ⁄16 (1.6)
Cold-Finished Seamless Tubes
Under 2 ⁄2 (63.5) 0.010 (0.25) 0.010 (0.25)
2 ⁄2 (63.5) to 3 (76.2), excl 0.012 (0.30) 0.012 (0.30)
3 (76.2) to 4 (101.6), incl 0.015 (0.38) 0.015 (0.38)
Over 4 (101.6) to 7 ⁄2 (190.5), incl 0.015 (0.38) 0.025 (0.64)
Over 7 ⁄2 (190.5) to 9 (228.6), incl 0.015 (0.38) 0.045 (1.14)
A
These permissible variations include out-of-roundness. These permissible varia-
tions in outside diameter apply to hot-finished seamless, and cold-drawn seamless
tubes before other fabricating operations such as upsetting, swaging, expanding,
bending, or polishing.
TABLE 4 Permissible Variations in Outside Diameter, Pipe
Permissible Variations in Outside Diameter
Nominal Pipe Size in. (mm) Plus Minus
in. mm in. mm
1 1 1 1
⁄8 (3.2) to 1 ⁄2 (38.1) incl ⁄64 0.4 ⁄32 0.8
1 1 1
Over 1 ⁄2 (38.1) to 4 ⁄32 0.8 ⁄32 0.8
(101.6) incl
1 1
Over 4 (101.6) to 8 ⁄16 1.6 ⁄32 0.8
(203.2) incl
3 1
Over 8 (203.2) to 18 ⁄32 2.4 ⁄32 0.8
(457.2) incl
1 1
Over 18 (457.2) to 26 ⁄8 3.2 ⁄32 0.8
(660.4) incl
5 1
Over 26 (660.4) to 34 ⁄32 4.0 ⁄32 0.8
(863.6) incl
3 1
Over 34 (863.6) to 48 ⁄16 4.8 ⁄32 0.8
(1219.2) incl
6. Mechanical and Other Properties
6.1 The material shall conform to the mechanical property requirements specified in Table 2.
6.2 Hydrostatic Test:
6.2.1 Each pipe or tube with an outside diameter ⁄8 in. (3.2 mm) in. (3.2 mm) and larger, or tubes with a wall thickness of 0.015
in. (0.38 mm) and over, shall be tested by the manufacturer to an internal hydrostatic pressure of 1000 psi (68.9 kPa) provided that
the fiber stress calculated in accordance with the following equation does not exceed the allowable fiber stress, S, indicated below:
S 5 PD/2t (1)
~ !
B690 − 22
where:
S = allowable fiber stress for material in cold-drawn condition, ( ⁄4 × UTS.) 16 700 psi (1150 kPa),
P = hydrostatic test pressure, psi (or kPa),
D = outside diameter of the tube or pipe, in. (or mm), and
t = minimum wall thickness, in. (or mm), equal to the specified wall thickness minus the permissible “minus” wall tolerance,
Table 3, or the specified minimum wall thickness.
6.2.2 Any pipe or tube showing leaks during hydrostatic test shall be rejected.
6.2.3 When so agreed upon between the purchaser and manufacturer at the time of the purchase order, pipe or tube may be treated
to 1 ⁄2 times the allowable fiber stress of S in 6.2.1.
6.2.4 When specified b
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